Pulley Generator - Parametric Timing Belt Pulleys by Koolm

Koolm

Hobby & DIY>Other Hobby & DIY

IP Report

Print Profile(2)

All

P1S

P1P

X1 Carbon

X1E

A1 mini

Example 1: T5 27T Pulley

Designer

28 min

1 plate

4.8(4)

Example 2: HTD 20T Pulley

Designer

1.8 h

2 plates

Open in Bambu Studio

Boost

1745

2899

797

178

Released

Description

Looking for Timing Pulleys? Look no further.

This OpenSCAD script allows you to generate a wide variety of parametric timing pulleys with customizable profiles, dimensions, and hub configurations. Supporting industry-standard belt types such as MXL, XL, L, GT2, HTD, T-series, and more, this script is perfect for designing custom drive systems, robotics, automation projects, and 3D-printed mechanisms.

Click on Customize to open the generator.

Using Bambu Studio or Bambu Handy? Click here to customize the model on Makerworld.com.

🚀 Quick Start

1. Select a Pulley Type

Choose from a variety of timing belt profiles. Adjust key parameters like tooth count and pulley width to match your belt specifications.

2. Customize Your Pulley

Each pulley type offers configuration options:

Flange Configuration: Choose whether your pulley has no flanges, a top flange, or both flanges for belt retention. Adjust flange height, thickness, and taper to suit your needs.
Bore Type: Select the bore type, including cylindrical, keyway, D-bore, or hex, and customize its dimensions for a precise fit.
Hub & Mounting: Opt to include a hub for additional shaft support. Configure set screws with adjustable diameter, position, and count to ensure secure attachment.

3. Render and Export

Once customized, generate the pulley and export it for slicing and printing. Enjoy!

⭐ Features

Multiple Belt Profiles
Supports industry-standard timing belt profiles, including GT2, HTD, T-series, XL, L, and more.
Customizable Geometry
Fine-tune multiple aspects of the pulley like its dimensions, hub, retainers, bore and mounting options.
Precision Modeling
Built to match real-world timing belt pulley standards while maintaining clean geometry.
3D Printing Ready
Tooth clearance is automatically set. Screw holes feature a teardrop shape for improved printability.

🛠️ Changelog

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Comment & Rating (33)

@user_4171413800

Suggestion for the description. Add the URL to the this page as a link. I've been confused every time I've seen these parametric models because I use either Bambu Handy or Bambu Studio to search models. I didn't know that Makerworld.com had a different interface for these models. The button for 'Customize' does not exist in either Bambu Studio or Bambu Handy, so it's very confusing seeing the model pop up and having no way to access the parametric system. I'm sure many others are the same, but a link saying "If using Bambu Studio or Bambu Handy, click here:" and it'll bring them to this page to customize.

The designer has replied

@koolm

Hi @user_4171413800 , great suggestion, I will make sure to integrate this into the format of my posts. I will also raise a ticket to see if Bambu could enhance the UI to make sure this is clear for mobile users.

(Edited)

@user_655237442

This is great! I'd like to be able to modify the width of the keyway and make a cutout for a captive hex nut rather than thread the grub screw directly into the printed material. I've tried modifying the code, but it's beyond my ability to get it right...Any chance you could add those customization options?

The designer has replied

@koolm

Hi @user_655237442 , I think I follow, but could you clarify your feature request? Just to make sure I understand what you're asking. The width of the keyway should already be adjustable by adjusting the bore size.

(Edited)

@user_655237442

Replying to @koolm :

The keyway size is currently constrained by the boresize; I’d like to be able to independently specify it. For example, I need a 14mm boresize with a 5mm wide keyway, 2.5mm deep (half the width). The other request, which isn’t for keyed pulleys but for those that require set screws, is for a captive nut slot so the screw doesn’t strip the plastic threads.

@koolm

Replying to @user_655237442 :

Got it! I'll make sure to include both features in the next update. I'm currently wrapping up a new script, and once that's done, I'll be revisiting and improving the existing ones.

@MadAussieMatt

Boosted

Another great generator by the master.

@Thomas3D

Boosted

A Fantastic Tool What I would still wish for would be the vertical positioning of the holes/threads as well as the arrangement when two holes are set Currently it is not possible to construct two opposing ones

The designer has replied

Show original

@koolm

Hi @Thomas3D , thank you for the support. It's added to the list - I'll do my best.

@koolm

Hi @Thomas3D , version 1.1 has just been published! 🚀 It features both vertical positioning and opposing hole arrangement. You can adjust the vertical position using the Screw Offset parameter. For opposing holes, set Screw Count to 2 and Screw Angle to 180 degrees. Cheers!

@Thomas3D

Boosted

Replying to @koolm :

@koolm I've already seen it :):) That was incredibly fast, and I'm delighted with how well it turned out! Unfortunately, I'm currently out of boost tokens…

(Edited)

Show original

@StarBuck_BSG

Boosted

i have not used this yet but i know i will someday so deserving of a boost for that reason.

@igghh1

Boosted

good idea

@Bigbubbles2

Boosted

Outstanding job I love this now I can build my own and not worry about trying to find the right items. The way I wanna be thank you you’re awesome!

@pixel_cup

90% complete 3D printing a 3D printer (*^_^*)

Show original

@user_1685505375

Boosted

Nice

@user_1256852440

Boosted

Perfect, thank you very much!

The designer has replied

Show original

@koolm

Merci beaucoup :)

License

This user content is licensed under a Standard Digital File License.

You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.

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